A total of five hundred "light stones." This was the number that archpriest Horace handed over to Abel. This was the amount he was willing to give to demonstrate the sincerity of his apology.
Abel handed a "light recovery potion" in return. "Forgive me for striking too hard just then, archpriest Horace. Please, feed the potion to archpriest Ferguson."
After taking the potion over, archpriest Horace passed onto archpriest Ferguson very carefully. archpriest Ferguson didn't take the potion, though. Instead, he looked at archpriest Horace for a bit before placing it inside his portal item. They knew the potion was enough to feel the injury completely. Still, they also believed that it was better to be saved than to be used on an intermediate-level injury that's already starting to recover.
